Allow custom menu button templates
Allow custom menu button templates

Wrap the default menu button (circle with hamburger icon) in <content>
tags so that it can be overridden as needed

SeedScientific/polio,SeedScientific/polio,unicef/polio,SeedScientific/polio,SeedScientific/polio,SeedScientific/polio,unicef/polio,unicef/rhizome,unicef/rhizome,unicef/polio,unicef/rhizome,unicef/polio,unicef/rhizome